function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 61],
    ['2022', 159],
    ['2021', 12],
    ['2020', 21],
    ['2018', 42],
    ['2017', 24],
    ['2013', 54],
    ['2007', 17],
    ['2006', 33],
    ['1985', 19],
    ['1969', 16],
    ['1968', 33],
    ['1942', 38],
    ['1923', 39],
    ['1753', 12],
    ['Other (33)', 122]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=702)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerYear', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerYear'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerYear);